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Finding the Fourth Proportional to 324,647.98, 486,971.96 and 87,990.65

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Solution

The fourth proportional to 324,647.98, 486,971.96 and 87,990.65 is: 131,985.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,647.98 : 486,971.96 = 87,990.65 : x
  2. Step 2: Convert to fraction form
    324,647.98/486,971.96 = 87,990.65/x
  3. Step 3: Cross multiply
    324,647.98x = 486,971.96 × 87,990.65
  4. Step 4: Simplify right side
    324,647.98x = 42,848,978,852.22
  5. Step 5: Solve for x
    x = 42,848,978,852.22/324,647.98
  6. Step 6: Final answer
    x = 131,985.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.